Dual Quaternion skinning

Create better skinned characters with more realistic deformations. Avoid “bow-tie” or “candy-wrapper” effects, in which the mesh loses volume as deformers are twisted or pivoted, which can commonly occur in characters’ shoulders or wrists.

This new option in the Skin modifier enables you to paint the amount of influence skinning has on a surface; use it where you need it, and taper off to linear skinning where you do not.